7 Atmospheric Moisture

7 Atmospheric Moisture - Atmospheric Moisture and Water...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Atmospheric Moisture and Water Balance GEOG345 Sep 19 2006 Textbook: chapter 3 Water in the earth system Water can be found in all three phases in our environment Cryosphere major reservoir of fresh water plays important role in energy balance Oceans and other water bodies major reservoirs of heat impact on climate major sources of water vapor Atmosphere water vapor is one of the trace gases in the atmosphere concentration varies greenhouse gas clouds (liquid water, ice crystals) impact radiative energy balance phase changes and corresponding latent and sensible heat transfer are major components of the energy balance precipitation is an important process in the climate system The role of water: hydrologic cycle 85% 15% 1 weeks supply of water for precipitation 2.5 cm of precipitable water Fig. 4-1, p. 86 The water molecule dipolar nature causes hydrogen bonding Fig. 4-2, p. 86 Hexagonal ice crystal structure hexagonal ice crystals can join together to form snowflakes etc. Fig. 2-3, p. 31 Phase changes (and latent heat) from more organized to less organized from less organized to more organized Fig. 4-3, p. 87 Evaporation, condensation and saturated air Saturation : number of evaporating molecules equals the number of condensing molecules Saturation is more likely to occur at cooler temperatures warm air can hold more water vapor than cool air Fig. 4-4, p. 87 Condensation nuclei Many aerosols act as cloud condensation nuclei. Measures of humidity There are different ways to express water vapor content absolute measures absolute humidity vapor pressure relative measures water vapor amount is related to the amount or conditions of the air specific humidity mixing ratio relative humidity Fig. 4-6, p. 89 Absolute humidity absolute humidity = mass of water vapor / volume of air...
View Full Document

This note was uploaded on 04/10/2008 for the course GEOG 345 taught by Professor Csiszar during the Fall '06 term at Maryland.

Page1 / 34

7 Atmospheric Moisture - Atmospheric Moisture and Water...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online